Rosemary Oil for Hair: A nutritional, intensive formula infused with biotin to nourish and strengthen your hair; Perfect on natural hair, protective styles and on braids and weaves. Faster and Thicker Hair Growth: Both rosemary essential oils and mint are known to increase blood circulation, allowing more oxygen to be transported to your scalp. More oxygen will stimulate your hair follicleBiotin collagen and Keratin is purposely meant to boost hair growth, beautify skin and boost nail growth.product contains active ingredients like collagen, biotin and Keratin dosage is twice daily.